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51 lines
1.6 KiB
51 lines
1.6 KiB
// ---------------------------------------------------------------------------- |
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// Copyright (C) 2009 Sebastian Redl |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// For more information, see www.boost.org |
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// ---------------------------------------------------------------------------- |
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#ifndef BOOST_PROPERTY_TREE_ID_TRANSLATOR_HPP_INCLUDED |
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#define BOOST_PROPERTY_TREE_ID_TRANSLATOR_HPP_INCLUDED |
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#include <boost/property_tree/ptree_fwd.hpp> |
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#include <boost/optional.hpp> |
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#include <string> |
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namespace boost { namespace property_tree |
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{ |
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/// Simple implementation of the Translator concept. It does no translation. |
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template <typename T> |
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struct id_translator |
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{ |
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typedef T internal_type; |
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typedef T external_type; |
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boost::optional<T> get_value(const T &v) { return v; } |
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boost::optional<T> put_value(const T &v) { return v; } |
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}; |
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// This is the default translator whenever you get two equal types. |
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template <typename T> |
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struct translator_between<T, T> |
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{ |
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typedef id_translator<T> type; |
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}; |
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// A more specific specialization for std::basic_string. Otherwise, |
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// stream_translator's specialization wins. |
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template <typename Ch, typename Traits, typename Alloc> |
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struct translator_between< std::basic_string<Ch, Traits, Alloc>, |
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std::basic_string<Ch, Traits, Alloc> > |
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{ |
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typedef id_translator< std::basic_string<Ch, Traits, Alloc> > type; |
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}; |
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}} |
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#endif
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